Daniel Downing, from Bodmin, sadly missed Saturday's event in Truro which had been organised especially for him after he had to be taken to hospital.

The little boy has an aggressive brain tumour called pontine glioma and survival is averaged at nine months from diagnosis.

Andy Graves brought the Transformer vehicle down to Cornwall this weekend and spent the day meeting families outside The Entertainer store.

He told Cornwall Live last week: "I am coming down especially to meet a young boy called Daniel, age five, from Bodmin who is really poorly with a brain tumour.

Optimus Prime visits Truro

"He is a big Transformer fan and I wanted to get down and show him Optimus before he gets to unwell to be able to go for a ride in Optimus with me."

As Daniel could not attend because he was feeling poorly, Andy took Jack, Daniel's eight-year-old brother, down from Bodmin to the Eden Project for Little Harbour Hospice's Christmas party on Sunday.

He also revealed that he will come back for Daniel on Saturday (December 16). The details of the visit are still being finalised.

Daniel's brother, Jack with driver Andy Graves at the wheel of Optimus Prime

Stephanie, the boy's mum, explained that her son is still feeling poorly.

She said: "He was taken to the hospital on Sunday and is still at Little Harbour Hospice [in Porthpean].

"He is now unable to walk and has to use a wheelchair."

However, she is still hoping that Daniel can make it to Optimus Prime's second visit.

Optimus Prime badge

"I kept the first visit secret from the boys, but I am hoping that this time Daniel can attend," she said.

"He is really looking forward to it and I am over the moon that the driver is coming back. It is all about memory making."

A Just Giving page set up for Daniel's family states: "Daniel is the most amazing five-year-old young man you could ever wish to meet.

"Full of life, mischievous, polite, intelligent, innocent, and above all, loving. He is adored and cherished by his mum Steph, his dad Robbie, his brother Jack and Steph's partner, Ady. Daniel has such an adorable character that he really fits the phrase 'once met, never forgotten'.

Daniel Downing receives some toys during his visit to the Cummings of Bodmin dealership

"Sadly and oh so very suddenly, Daniel has been diagnosed with a very aggressive cancer called pontine glioma. Survival is averaged at nine months from diagnosis.

"To make this terrible situation even harder for the family, the treatment to give him the longest life possible and to allow time for some extra special memories to be made, has to be administered in Bristol, some 200 miles away from the family home and almost 300 miles away from his dad.

Daniel Downing of Bodmin behind the wheel of one of the sports cars

"The first course of treatment is daily for the next six weeks. Further treatment plans will be dependent on how Daniel responds.

"This page has been set up to try to relieve the family of one of the practical aspects that immediately face Steph and Robbie, that being the cost of being at Daniel's bedside, daily for Steph and when time away from work allows for Robbie, whilst at the same time trying to maintain as much normality as possible for Jack.

"In simple terms, it is going to be very expensive for them to set up a temporary home and life in Bristol for the next six weeks, at a time when their heads are simply trying to understand the devastating news that no parent should ever hear.

Daniel and his mum Stephanie Downing of Bodmin admire some of the sports cars

"There is no cure. There are no words that any of us can say that will erase the pain and fear for this loving family.

"If together we can raise enough money by each finding a few spare pennies, so that it is one less thing for them to worry about right now, allowing them to focus on Daniel and Jack, then that would be an amazing gift."

Daniel and his brother Jack were picked up in a classic Aston Martin DB4 Vantage and brought to the car dealership Cummings, near to his home.

Daniel was also handed several presents of toy model cars during the day.

The event was organised by Teddy Bear Run with help from Sporting Bears Motor Club - the two charities were set up by motoring enthusiasts to raise money for children - as well as motoring club Car Addicts, the dealership Cummings of Bodmin and a local Ferrari owners’ club.